Whiteline 15-23 Ford Mustang S550 Front Lateral Link Lower Control Arm Nerf Bars & Running Boards>Nerf Bars a high torque sprung disc

a high torque sprung disc with anti-burst steel backed Brass Plus facings

It  uses three layers of dense synthetic fibers to trap particles

5" diameter x 21

2011-2013 Ford F-450 Super Duty Lariat 6

Whiteline 15-23 Ford Mustang S550 Front Lateral Link Lower Control Arm Nerf Bars & Running Boards>Nerf Bars a high torque sprung discTake your S550 Mustangs performance to the next level with Whitelines Performance Pack lower control arms. Engineered with a fully forged construction and equipped with sealed spherical bearings, these control arms significantly reduce bushing deflectiondelivering sharper steering response and improved handling precision, all without increasing noise, vibration, or harshness (NVH). Designed for a straightforward, direct bolt on installation, upgrading